egirlskey/src/api/endpoints/following/delete.js
2017-03-01 17:37:01 +09:00

93 lines
1.7 KiB
JavaScript

'use strict';
/**
* Module dependencies
*/
import * as mongo from 'mongodb';
import User from '../../models/user';
import Following from '../../models/following';
import event from '../../event';
import serializeUser from '../../serializers/user';
/**
* Unfollow a user
*
* @param {any} params
* @param {any} user
* @return {Promise<any>}
*/
module.exports = (params, user) =>
new Promise(async (res, rej) =>
{
const follower = user;
// Get 'user_id' parameter
let userId = params.user_id;
if (userId === undefined || userId === null) {
return rej('user_id is required');
}
// Validate id
if (!mongo.ObjectID.isValid(userId)) {
return rej('incorrect user_id');
}
// Check if the followee is yourself
if (user._id.equals(userId)) {
return rej('followee is yourself');
}
// Get followee
const followee = await User.findOne({
_id: new mongo.ObjectID(userId)
}, {
fields: {
data: false,
profile: false
}
});
if (followee === null) {
return rej('user not found');
}
// Check not following
const exist = await Following.findOne({
follower_id: follower._id,
followee_id: followee._id,
deleted_at: { $exists: false }
});
if (exist === null) {
return rej('already not following');
}
// Delete following
await Following.update({
_id: exist._id
}, {
$set: {
deleted_at: new Date()
}
});
// Send response
res();
// Decrement following count
User.update({ _id: follower._id }, {
$inc: {
following_count: -1
}
});
// Decrement followers count
User.update({ _id: followee._id }, {
$inc: {
followers_count: -1
}
});
// Publish follow event
event(follower._id, 'unfollow', await serializeUser(followee, follower));
});